Question

7. A convex polygon has 18sides. Find the sum of theinterior angles.

Answer 1

The formula for the sum of all interior angles is

`\text{Sum}=(n-2)180`

where n represents the number of sides. In our case, n=18. Then, by replacing this value into the last formula, we have

`\begin{gathered} \text{Sum}=(18-2)180 \\ \text{Sum}=(16)180 \end{gathered}`

Therefore, the answer is 2880 degrees